调试 – Xcode的“po”无法识别我想学习的变量. WNY？

环境： Xcode 6 Beta 4
我试图只使用一个文本值
调试器.但是,调试器无法识别静态变量(通过’Let’).对于vars也是如此.

为什么？

func textFieldShouldReturn(textField:UITextField) -> Bool {
    let myText = "Hello World"
    let theText = textField.text! as String
    return true
}

这是调试器的结果：

(lldb) po textField error: :1:1: error: use of unresolved
identifier ‘textField’ textField ^ :11:5: error: use of
unresolved identifier ‘$__lldb_injected_self’
$__lldb_injected_self.$__lldb_wrapped_expr_29(
^ (lldb) po myText error: :1:1: error: use of unresolved identifier ‘myText’ myText ^ :11:5: error: use of unresolved
identifier ‘$__lldb_injected_self’
$__lldb_injected_self.$__lldb_wrapped_expr_30(
^ (lldb) po theText error: :1:1: error: use of unresolved identifier ‘theText’ theText ^ :11:5: error: use of unresolved
identifier ‘$__lldb_injected_self’
$__lldb_injected_self.$__lldb_wrapped_expr_31(
^ (lldb)

注意：调试输出设置为“全部输出”.

这是截图：